Scanning tunneling microscope image of a 48-nanometer square sample of an iron-based superconductor finds a\n array of dumbbell-shaped “impurities” in the electronic structure, like the sample in the inset, confirming a theoretical prediction. The electronic impurities are associated with cobalt […] ↓ Read the rest of this entry…

This mosaic represents the distribution of superconductivity around holes (white) in a thin sheet of superconducting film. Green indicates strong superconductivity. Further away from the holes, the superconductivity decreases (yellow, red and finally black, where the material is densely populated […] ↓ Read the rest of this entry…